Type N male chassis connectors

Hello everyone.
Does anyone know where I can find some Type N male chassis connectors?
I've heard it mentioned that a certain type has a threaded center pin.
This would be ideal for my patch feed.
Please contact me off list if you have any suggestions.. My email address
is:
k0kn@qsl.net
Thanks and 73!
Kyle Yoksh, K0KN
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